<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
    <title>排序</title>
</head>

<body>
    <div id="root">
        <h2>人员列表</h2>
        <input type="text" placeholder="请输入名字" v-model="keyWord">
        <button @click="sorttype=2">年龄升序</button>
        <button @click="sorttype=1">年龄降序</button>
        <button @click="sorttype=0">原顺序</button>

        <ul>
            <li v-for="(p,index) of filpersons" :key="p.id">
                {{p.name}}-{{p.age}}-{{p.sex}}
            </li>
        </ul>
    </div>

    <script>
        const vm = new Vue({
            el: "#root",
            data: {
                sorttype: 0,
                keyWord: "",
                persons: [
                    { id: "002", name: "马冬梅", age: 25, sex: "男" },
                    { id: "003", name: "周冬雨", age: 20, sex: "男" },
                    { id: "001", name: "周杰伦", age: 18, sex: "男" },
                    { id: "004", name: "温兆伦", age: 35, sex: "男" },
                ],
            },
            computed: {
                    filpersons() {
                        const arr = this.persons.filter((p) => {
                            return p.name.indexOf(this.keyWord) !== -1
                        })
                        // 判断是否需要排序
                        if (this.sorttype) {
                            arr.sort((nval, oval) => {
                                return this.sorttype == 1 ? oval.age - nval.age : nval.age - oval.age
                            })
                        }
                        return arr
                    }
                }

        })


    </script>
</body>

</html>